Valve-grinding device.



UNITED STATES PATENT oFFIcn BE WILL e. VAUGHN, or RICHMOND, VIRGINIA, ASSIGNOR or ONEFHALF To DALLAS A.

- the axis of the valve.

To this end the invention consists .nation of parts hereinafter described in degrinding tool in position for use;

' grinding operation. ,Fig. 4; isgadetgiil view To all whom it may concern:

State of Virginia, have inventednewand useful Improvements in'Valve-Grinding De tion.

position of the valve on its seat during 'the' engaging the tool fromthe valve, and furand' valve to insure a firm connection between the same should said tool be tilted.

"reference being had to the accompanying drawings in which:-'

by which the position of the valve-,vvit' re- 16 fixed on a shaft 17 exten I nallywithin the barrel10 and pro ecting indefinite distance.

SHAFFER, OF RICHMOND. VIRGINIA.

VALVE-GRINDING DEVICE.

Beit known-that I, DE WILL G. VAUGHN," a citizen of the United States, residing-at Richmond, in the county of Henrico and vices, of which the following is a specifica- This invention relates to valve grinding tools of a simple portable type designed to be manually operated for imparting an.oscillating movement to the valve being:v ground; providing means for changing the act of grinding without removing or ,dis-'.

ther providing means for engaging the tool intentionally or accidentally out of line with of the novel construction, arrangement and combis" tail and pointed out in the appended claims,

Figure 1 is an elevation of the improved Fig. 2 a vertical central sectional view-of. the'tool, and Fig. 3 is a detail view. illustrating arts lation to its seat may be changed during the partly in sectionillustrating the means for centering the bit. 7 I I In the drawing, the numeral 10 designates zip-cylindrical barrel onione endq of which is secured a hand piece 11, in the, presentin.-- stance by means of a lug 12-onthe lower end of the handle'fitting into thebarrel. and fastened by a screw 13, any other means of stituted if desired. 'Slidably mounted within the barrel, referably near its lowerend, is a sleeve 14 t brmed with an internal screw thread or worm groove 15 engaging a worm i'ng longitudioutwardly therefrom at its lower end for an The upper endofthe shaft 17 turns a bearing nthe' lug 12 and the f shaft; 1f A ,extension bears againstthe closed lower end -tubularextension 25 into the tion 18 of the shaft 17 and limits the end- -Specification of Letters Patent. Pateht'ed Dec, 5, 1911. Application filed May 18, 1911. .Serial No.'628,066. I

is heldjfrom endwise movement by any appropr1ate means, such as a screw 17. Near its lower end the shaft 17 is reduced in di ametef' as at 18;for a purposeto be hereinafter described.-

. Mounted to rotate'in 'thefhandpiece 11' near its lowertend is a-transverseshaft 19 provided with a hahdprank or other rotat- 1ngmeans2O on one end and a short crank 21.0nits opposite end by means of which reciprocating motion is imparted to the sleeve 14 through a connecting rod 22 pivoted to said crank and to a screw, pin or the like 23 ro ecting from said sleeve through ga'slot 24 in the barrel 10. I

: Telescopically fitting over the lower end of the17 is" a tubular extension 25 of any deslr edlength provided withabit 26 on itslower'end for engaging a slot in the .VfllVG to be ground, an'dxwlth a pluralitylof parallel longitudinal slots,27 on its upper end with anyone of'whicha pin or key 28 on the shaft 1'7 is adapted 'to engage when the tubular extension 25 is slid upwardly on I spring 29 within the jtubular thereof and against the end of; the shaft 17 and normally holds the slotted-end of said extension outofengagement with the pin orv key 28. A screw 'orp1n30 'projectsfrom the reduced porwise movement of the extension on said shaft, but permits. free rotation of the same when disengaged from the pin or key 28 to; I

change the position of the valvewhile beingground.- For convenience in rotatingthe tubular extension 25, a collar 31- is mounted thereon and is here shown as held in place i.

by the same screw 30 that projects into the 1 reduced portion of the shaft 17.

. The bit 26 is a thin plate pivoted centrally at 32 in a slot 33 cut in the lower end of the sleeve 34 removably fastened by, a

screw or bolt 35 on the lower end ofthe tubular-exten'sion 25. Attached to the bit and.

projecting beyondits engaging edge is a stud 36 which enters 'ahole in. the axial line of the valve and centers the bit. The stud also assists in preventing said bit from slipping out of the receivlng notch a in the valve.

spring 29 and holding In operation the valve to be ground is made'with a slot in its upper face into which the bit 26 of the grinding tool is inserted, and the tool held in. line with the axis of said valve. Pressure being applied to the hand grip, the shaft 17 is telescoped within the tubular extension 25, compressing the the valve with a yielding pressure against its seat. The downward telescopic movement of the shaft 17 brings the pin or key 28 into engagement with one of the notches 27 on the upper end of the tubular extension, thus locking these two parts together so that they will oscillate in unison. Now upon turning the hand crank 20 the sleeve 14, through the connections described, will be moved rectilinearly for a short distance, turning the shaft 17 through the worm connection with said sleeve a partial rotation in one direction and a similar movement in the opposite direction, thereby oscillating the valve in its seat and grinding the same. After .a certain length of time the pressure imparted through the handpiece is relieved sufficiently to disengage the key from the notches 27 in the tubular extension, but not sufiiciently to permit the bit to be removed or slipped off, or become disengaged from the valve, there being sufiicient pressure to retain said bit in place. The tubular extension is now turned for a short distance, by grasping the collar 31in the hand, for the purpose of changing the position of the valve with relation to its seat, after which the hand-piece is again pressed down to cause engagementof the shaft 17 with the tubular extension and the grinding motion is continued. This motion is continued until the valve has been tightly ground into its seat, after which the tool is removed.

The bit 26 is pivotally mounted on the lover end of the tubular extension, and serves a very useful purpose, as it is well known that to hold the tool so that the shaft 17 will always be in line with the axis of the valve is a diiiicult matter, and should the bit be rigidly attached to the tubular extension any inclination given to the tool is liable to cause the bit'to slip or jump from the notch in the valve, but by pivoting the bit on the tool these inclinations Will not alter the position of the bit which will at all times remain firmly and squarely in the notch made in the valve to receive it. The upper ends of the septa or fingers between the notches 27 are preferably pointed as shown, so that when the shaft 17 is depressed it will cause the pin 28 to enter one of said notches and there will be no liability of said pin striking the top of said fingers and thereby fail to enter a notch.

This improved tool is simple and cheap in 7 construction, strong and very eflicient. By

its use valves may be ground by hand with ease and accuracy and in places where it is impossible or difiicult for power machines to operate.

Having thus described the invention what is claimed as new is 1. A valve grinding tool comprising an oscillating shaft, a worm on Send shaft, a longitudinally movable sleeve cooperatively engaged with said worm to oscillate said shaft, a tubular extension telesco ically and rotatably mounted on said shaft and provided with a bit, means for connecting said tubular extension to the shaft for oscillating the former when longitudinal pressure is applied to said shaft, and resilient means for disengaging said parts when released from ressure.

2. valve grinding tool comprising a barrel, an oscillating shaft mounted longitudinally thereon, a worm on said shaft, a longitudinally movable sleeve cooperatively engaged with said worm to oscillate said shaft, a tubular extension telescopically mounted on said shaft and adapted to be rotated independently thereof, means for limiting the telescopic movement of said parts, a clutch device for connectin said tubular extension to the shaft for osci lating the extension when longitudinal pressure is applied to said shaft, resilient means for disengaging said parts when released from pressure, and a bit pivotedon the lower end of the tubular extension for engaging a valve to be ground.

3. A valve grinding tool comprising a barrel, a hand piece fixed on one end of said barrel, a longitudinal oscillating shaft in said barrel journaled in the hand piece, a worm on said shaft, a rectilinearly movable sleeve cooperatively engaged with said worm to oscillate the shaft, a crank shaft on the hand piece adapted to operate said sleeve, a tubular extension telescopically and rotatably mounted on said shaft, a swinging bit on said tubular extension, a clutch device for connecting said shaft and the tubular extension, and resilient means for disconnecting' said clutch device.

4. A valve rinding tool comprising a two part telescoplc shaft, said parts normally rotatable independently of each other, means for connecting said parts to oscillate in unison when telescoped by the application of pressure, a spring for partly separating said parts and disengaging said connection, a worm fixed on one part of said shaft, a bit pivotally connected to the other part, and rectilinearly movable means for oscillating said worm and its attached shaft.

5. A valve grinding toolcomprising a two part telescopic shaft, said parts normally rotatable independently of each other, one of said parts having a plurality of parallel longitudinal slots in one end, the other part bearing a pin adapted to enter any one of isiiid'isl'ots-underpressure to-loc'k said parts In testimony whereof I have hereunto set together; a. spring for disconnecting said my hand in presence of two subscribing 10 parts, a worm fixed on one part of said witnesses. i shaft, a bit pivotally mounted in a sleeve de- 1 5 tachably connected tothe other part, and E WILL-VAUGHN' a rectilinearly movablesleeve cooperating Witnesses: v with said Worm for oscillating the same and DALLAS A. SHAFER,

the attached shaft. I NORVELL B. WALKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents, Washington, D. (1. 

